Magnetron supporting apparatus



Dec. 8, 1959 A. s. ITTERMANN ET AL 2,915,248

MAGNETRON SUPPORTING APPARATUS 2 Sheets-Sheet 1 Filed Jan. 11, 1954 FIGLI S A. MITCHELL BY [03% ATTORNEY Dec. 8, 1959 A. s. ITT'ERMANN ET AL 2,916,248

MAGNETRON SUPPORTING APPARATUS Filed Jan. 11, 1954 2 Sheets-Sheet, 2

FIG. 5

INVENTORS: S. ITTERMANN A. MITCHELL ATTORNEY United States Patent MAGNETRON SUPPORTING APPARATUS Alfred S. Ittermaun and Gerald A. Mitchell, White Bear Lake, Minn., assignors to Western Electric Company, lrrlcolfporated, New York, N.Y., a corporation of New Application January 11, 1954, Serial No. 403,376

2 Claims. (Cl. 248287) This invention relates to magnetron-processing apparatus, and more particularly to apparatus for supporting electromagnets adjacent to magnetrons.

In the manufacture of magnetrons, or the like, magnetrons are often built by first completely assembling each magnetron without sealing it, and then pulse-pumping the magnetron which comprises continuously evacuating the magnetron while energizing it to cause the cathode thereof to emit any gas which it may have to bring the magnetron to a uniformly operable state. The magnetron then is moved while still under vacuum to a sealing-0E station in which it is hermetically sealed and then is tested. In the energization of the magnetron during the pulse-pumping, heavy electromagnets must be brought into proximity with the magnetron. In the past, it has been ditficult to bring the magnets to proper operating positions relative to the magnetron.

An object of the invention is to provide new andimproved apparatus for processing magnetrons.

A further object of the invention is to provide new and improved apparatus for supporting electromagnets.

Another object of this invention is to provide apparatus for supporting a heavy electromagnet in close adjustable proximity to a magnetron under test.

One embodiment of the present invention may include a member which supports an electromagnet in close proximity to a magnetron under test and which is supported jointly by springs and a mechanism operable to adjust the position of the electromagnet. Additional adjusting means mounted on the electromagnet supporting member provide for further adjustment of the position of the electromagnet.

A complete understanding of the invention may be obtained from the following detailed description of an apparatus forming a specific embodiment of the invention, when read in conjunction with the appended drawings, in which Fig. 1 is an enlarged, fragmentary top plan view of a portion of a device embodying the principles of the present invention;

Fig. 2 is an enlarged, fragmentary front elevation of the device, and

Fig. 3 is an enlarged, fragmentary vertical section taken along line 33 of Fig. 2 with portions thereof shown in elevation.

Referring now in detail to the drawings, there is shown therein a cart supported by rollers 11 spaced a predetermined distance apart for supporting a magnetron 12 in a fixed predetermined position on a housing 13 of the cart. The cart 10 also is provided with evacuating equipment in communication with the interior of the magnetron 12 and serving to continuously pump down the interior of the magnetron to a high vacuum. Vertically adjustable electromagnet assemblies 21 and 22 are movable between retracted positions in which pole pieces 24, 25, 26 and 27 are located in retracted positions widely separated from one another, and opera- Patented Dec. 8, 1959 Kit? tive positions in which the pole pieces 24 and 25 are positioned adjacent a portion 28 of the magnetron and the pole pieces 26 and 27 are adjacent to a portion 29 of the magnetron.

The assemblies 21 and 22 are identical with one another and are mounted identically, except that they are reversed with respect to one another, and, for convenience sake, only the assembly 21 and its mounting will be described in detail. The assembly 21 includes a core 35 of which the pole pieces 25 and 27 form the ends, and electromagnetic coils 36 and 37 are mounted on the arms of the core 35. The pole piece 27 and the base of the core 35 rest on a tray 41 composed of nonmagentic material which is provided with an annular base portion 42 and L-shaped flanges 43 fastened to rods 44 by set screws 45. The base 42 is provided with an opening 46 to provide clearance for the coil 37, and three screws 47 engage the core 35 to adjustably support the electromagnet in a tripod arrangement.

The rods 44 are fastened to a plate 51 by cap screws 52, and are mounted slidably in bushings 55 and 56 located in a base 57 and arms 58 and 59 of a U-shaped frame 60. The rods 44 also are slidable freely in bores 65 in lugs 66 formed rigidly on the frame 60, which form spring seats for compression springs 67 bearing against the lugs 66 and against collars 68 secured against movement along the rods 44 by set screws 69. A plate 72 is secured to the frame 60 by screws 73 to clamp anti-friction bearings 75 between the frame 60 and the plate 72, the anti-friction bearings being mounted on guide rods 81, which are supported by brackets 82 bolted to the wall 83 of the test set. The plate 72 and the frame 60 may be slid between a retracted position, in which the lefthand arms 58 and 59, as viewed in Fig. 3, are adjacent the lefthand bracket 82 to provide clearance for moving the magnetron 12 into its operative position, and an operative position in which the righthand arms 58 and 59 are adjacent to the righthand bracket 82, and a cam 84 closes a limit switch 85 to set up the set 19 foroperation.

The brackets 82 and the rods 81 support the frame 60 through the anti-friction bearings 75, and the plate 72 and the lugs 66 on the frame 60 support the rods 44 and the tray 41 through the compression springs 67 and the collars 68. The springs 67 press the plate 51 continuously upwardly as far as it is permitted to go by a thrust bearing 86 positioned between a handwheel 87 provided with a tapped bore 88 therein screwed on a post 89 fastened rigidly to the plate 72. The handwheel 87 is provided with a handle 90 mounted rotatably by a screw 91 threaded into a bore 92.

The springs 67 urge the plate 51 continuously to its upper limit with only a limited amount of force greater than that of the combined weight of the electromagnet assembly 21 so that the plate 51 presses against the thrust bearing 86 with a light force and the handwheel 87 may be turned easily to move the plate 51 downwardlyfarther than it is shown in the drawings or to permit the plate 51 to be raised by the springs 67 above the position of the electromagnet shown in the drawings. This prevents heavy forces between the handwheel 87 and the plate 51. That is, in elfect, the springs serve as counterbalancing elements relative to the weight of the members supported thereby, and are just strong enough to maintain the plate 51 at its upper limit permitted by the handwheel 87 and the thrust bearings 86. The height of the assemblies 21 and 22 can be readily adjusted by the handwheels 87 so that, even though the magnet assemblies 21 and 22 are heavy, very little actuating effort is required to adjust the positions of the assemblies which may be effected very rapidly whenever needed. The

screws 47 serve to tilt the magnet assembly 21 if necessary for properly locating the assembly 21 relative to the magnetron.

The abovedescribed apparatus serves to permit magnetrons to be located quickly, and the electromagnet assemblies 21 and 22 to be precisely located relative to the magnetrons Without loss of time.

It is to be understood that the above-described arrangements are simply illustrative of the application of the principles of the invention. Numerous other arrangements may be readily devised by those skilled in the art which will embody the principles of the invention and fall within the spirit and scope thereof.

What is claimed is:

l. A device for mounting an article, comprising a pair of spaced brackets, a pair of parallel guides supported by the brackets, a frame mounted slidably on the guides and provided with a pair of depending arms, each of said arms being provided with a perforated lug projecting toward the other arm, a plurality of guide rods mounted slidably in the lugs, compression spring means supporting the guide rods on the lugs, a tray carrying the article fastened rigidly to the guide rods and supported thereby, a plate connected rigidly to the guide rods, a threaded rod projecting from the frame, a handwheel mounted threadably on the threaded rod, and a thrust bearing positioned between the plate and the handwheel for limiting upward movement of the guide rods by the compression springs.

2. A device for mounting an article, comprising a pair of spaced brackets, a pair of parallel guides supported by the brackets in horizontal position, a frame mounted slidably on the guides and provided with opposed pairs of depending arms, each of said arms being provided with a lug projecting horizontally toward the other arm of the pair, said lugs having vertical bores therein, a plurality of guide rods mounted in vertical positions slidably in the bores in the lugs, compression spring means on the guide rods and supported by the lugs, collars fixed to the rods for supporting the rods from the springs, a tray carrying the article fastened rigidly to the lower ends of the guide rods and supported thereby, a plate connecting the upper ends of the guide rods together, a threaded rod projecting upwardly from the frame, a handwheel mounted threadably on the threaded rod above the plate, and a thrust bearing positioned between the plate and the handwheel for limiting upward movement of the guide rods by the compression springs.

References Cited in the file of this patent UNITED STATES PATENTS 1,609,132 Sederholm Nov. 30, 1926 1,623,084 Baker Apr. 5, 1927 1,726,244 Shefstead Aug. 27, 1929 2,111,357 Cornell Mar. 15, 1938 2,324,559 Cooke July 20, 1943 2,398,340 Wilder Apr. 9, 1946 2,442,808 Granberry June 8, 1948 2,678,421 Dunsheath May 11, 1954 

